一类广义A-完备集的Hausdorff维数

通过对A-完备集进行推广,构造得到一列□n中的广义A-完备集E1,E2,...,Ev,在其结构矩阵满足p0次本原矩阵的情况下,得到并证明了其广义A-完备集的Hausdorff维数.     

一类Weierstrass函数修改成包含相位θk的图的维数

研究了形如∑∞k=1λ-ksin(λkt+θk)(λ>1)的Weierstrass函数图像的分形维数,证明了这类函数的Box维数与Hausdorff维数等于1.     

有限交性质及相关的分形维数

定义了广义Moran分形上的有限交性质,并讨论了有限交性质与开集条件的关系,同时给出了广义Moran集的Hausdorff维数。     

分形维数

基于盒维数法,分析了分形维数量测的各种方法,从二维的盒维数法到三维的立方体覆盖法(CCM)、改进立方体覆盖法(ICCM)、差分立方体覆盖法(DCCM)以及相对差分立方体覆盖法(RDCCM),并解释了各种方法对二维曲线以及三维粗糙面的覆盖原理。其次案例分析了四种三维分形量测方法的异同以及选用原则。最后总结展望了实际工程中分形维数对机械加工、三维重建的指导以及微观分析的辅助作用。     

关于分数维Hausdorff测度的积分

计算了自相似的分数维集合上关于Hausdorff测度的积分,把这种集合上Hausdorff测度与具有某种不变性质的奇异测度联系起来.     

基于关联维数的心电信号的研究

针对混沌在心脏系统中的研究,利用关联维数来进行心电信号的数据分析。通过对健康人、室性心律失常病人和窦性心动过缓病人3种类型心脏的数据作为样本进行对比分析。仿真实验结果说明了健康心脏的混沌性最强,为早期心脏疾病的辅助诊断提供了依据。     

求向量空间维数一例

该文通过对高等教育出版社出版的《高等代数》中的一个具体例子的求解,介绍了一种求有限维向量空间维数的方法。     

基于逃逸法的分形图像盒的维数计算

计算和分析了复动力系统分形图像的盒维数计算问题,将传统的逃逸时间算法进行推广之后应用于吸引子图像的维数计算,给出了具体的计算实例和比较结果.实验表明,该算法可以提高图像盒维数计算的准确性和可靠度.     

基于分形维数的梗丝形态差异性评价方法

为对梗丝形态差异性进行评价,通过测量单一形态梗丝周长、面积并采用“小岛法”计算其分形维数及形态指数,以叶丝形态为标准,选取梗丝与叶丝分形维数及形态指数的差异为指标,建立梗丝形态差异性系数模型及评价方法并验证分析。结果表明:①单一形态梗丝拟合方程决定性系数R2均达到0.850,且均方差及残差均较小,表明“小岛法”可准确计算其分形维数。②梗丝形态具有分形特性且不同形态梗丝分形维数具有明显差异,随着分形维数逐渐增大梗丝形态越来越不规则。③所建梗丝形态差异性系数模型$Y_e=4.825 X_{D_i-D^{\prime}}-1.149 X_{\bar{K}-\bar{K}^{\prime}}+0.320$,决定性系数R2达到0.948,F检验达到显著水平表明回归模型具有统计学意义,且模型经验证准确可靠。④初步建立了一种梗丝形态差异性评价方法,以差异性系数e为指标,梗丝形态间差异性小（e≤0.491）;较小（0.491 < e≤0.813）;适中（0.813 < e≤1.189）;较大（1.189 < e≤1.565）;大（e > 1.565）,该方法可通过定量指标实现对梗丝形态差异性的定性分析。      

一类广义康托函数的构造及其解析式

利用齐次康托集F{mi}构造一类广义康托函数φ（x）.应用实数的康托展式讨论广义康托函数φ（x）在齐次康托集F{mi}构成区间的特征,从而得到了广义康托函数φ（x）的解析式.推广了三分康托函数,获得一类新的分形曲线.     

Variations of Hausdorff Dimension and Selected Textural Indices of Cheddar and Gouda Cheeses During Storage

Two imported commercial cheeses (Cheddar and Gouda) were analyzed to characterize their textural changes during a storage period from 176 to 362 days at 4°C. Fractal dimension analysis was used to examine the structure of the cheeses, and a scaling model based on stress values was used to calculate fractal dimension (D_f) by the Hausdorff dimension count method. It was found that the variation of D_f of two cheeses showed a similar trend. When two cheeses were stored from 176 to 300 days, their D_f ranged from 2.37 to 2.43 for Cheddar or from 2.06 to 2.23 for Gouda cheeses. After that, the final values of D_f increased obviously to 2.87 (Cheddar cheese) or 2.63 (Gouda cheese) at the end of the storage period. The experiments carried out showed that the variation of D_f had a poor relationship with the changes of pH 4.6 soluble nitrogen and two instrumental textural indices (hardness and springiness) of the cheeses, especially in the late storage period, but the inhomogeneous cavities existing in the cheeses could be reflected by their D_f.     

一种大范围高精度定量传感器

针对某造纸厂150~1500 g/m2纸板定量测量需求,设计了一种四量程大范围高精度定量传感器。通过采用进口关键器件、空调恒温和温度补偿等技术,使其在150~1500 g/m2定量范围内均有较高的测量灵敏度和测量精度,达到了进口QCS定量传感器的同等性能水平。     

保加利亚乳杆菌高密度培养的初步研究

对培养保加利亚乳杆菌的基础培养基进行优选,确定为基础MRS培养基.然后优化培养条件发酵时间为12h,起始pH为6.4,发酵温度为37℃.培养基MRS培养基 7.5%番茄汁 12%麦芽汁 5%海带汁 2%乳清.通过正交试验证明,保加利亚乳杆菌菌体浓度可达到1.0×1012 cfu/mL.     

细号高密大提花织物的生产实践

主要介绍细号高密大提花织物的生产工艺及各工序采取的措施。     

提高细号高密织物布机效率的实践

以具体品种为实例，阐述了如何提高细号高密织物的布机效率，详细讨论了在纺纱、浆纱、织造过程中存在的技术难点及所应采取的技术措施。     

片梭织机织造细号高密涤棉织物的生产实践

介绍在片梭布机上开发细号高密织物的主要工艺参数以及为提高产品质量采取的措施。     

The Effect of Inhibitors and High Pressure Treatment to Prevent Melanosis and Microbial Growth on Chilled Prawns (Penaeus japonicus)

ABSTRACT: Ascorbic acid, citric acid, sodium benzoate, kojic acid, and 4-hexylresorcinol were evaluated alone and in combination as inhibitors of melanosis and microbial spoilage in prawns ( Penaeus japonicus ) under non-pressure and high-pressure conditions. Sodium benzoate and kojic acid was an effective combination for the inhibition of prawn melanosis. Alone and in combination with ascorbic or citric acid, 4-hexylresorcinol proved the most effective as inhibitors of melanosis and microbial spoilage in prawns. High-pressure treatment appeared to increase the melanosis process, but it did not alter the effect performed by inhibitors. Lower total count of microorganisms seemed to be obtained with the presence of ascorbic and citric acids under high-pressure treatment.     

A review of botanical characteristics, phytochemistry, clinical relevance in efficacy and safety of Lycium barbarum fruit (Goji)

Lycium barbarum has been used as a traditional Chinese medicine (TCM) to nourish liver and kidney, and brighten the eye. The fruits are dried or freshly squeezed for their juice and concentrated for beverages. Among various constituents, a group of polysaccharides (LBP) with a Glycan-O-Ser glycopeptide structure has been most researched and considered to be important for the efficacy of L. barbarum. Studies indicate effects of L. barbarum on aging, neuroprotection, general well-being, fatigue/endurance, metabolism/energy expenditure, glucose control in diabetics, glaucoma, anti-oxidant properties, immunomodulation, anti-tumor activity and cytoprotection. In addition to TCM, L. barbarum can be sold as a dietary supplement or classified as a food based upon the long and safe traditional usage. This review is to provide background and updated information of chemical constituents and efficacies with safety including a new direction for research and current regulatory situation of L. barbarum.